Use of graded-index fibers for matching injection lasers to optical fibers

Yu. M. Mironov, A. S. Semenov


Abstract: The possibility is considered theoretically of using graded-index fibers in improving the coupling of injection-laser radiation into multimode and single-mode fibers. It is shown that their use enables the coefficient of coupling into multimode fibers to be increased by a factor of 1.5–3.5, relative to that when the laser is directly connected to the fiber. A coefficient of coupling into single-mode fibers of 100% can be achieved by using an appropriate graded-index-fiber light guide.

UDC: 621.378.35

PACS: 42.80.Lt, 42.60.By, 42.55.Px

Received: 28.12.1977

 English version: Soviet Journal of Quantum Electronics, 1978, 8:6, 705–708